Ice packs delivered to the face can be used by high-output individuals to dump heat quickly, but should not be kept on long enough to cause vasoconstriction.

“ice packs delivered to the face are something that they actually use in order to dump heat quickly. Now, again, you don't want to keep the ice pack on your face. These are people that are very high work output, right? Firefighters and similar, at very high work output and then they'll put this essentially, it's like a cool face mask on their face. It allow their core body temperature come down and then they remove it, they're not keeping it on there so long that they're getting the vasoconstriction, okay?”